Entra ID synch error email with no error log to investigate

Question

We received an error twice via email that there's a problem with our AD server synchronizing with our Entra ID:

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When I went to the link in the email to check the Entra ID synch health I got no errors at all:

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Any idea what could be the problem?

Answer 1

Thanks @Marilee Turscak-MSFT

We did investigate the AD logs but the errors we got were very generic, here are the 2 log details (I just masked our internal data names for security reasons):

Error 1:

Log Name:      Application
Source:        ADSync
Date:          12/13/2023 3:32:21 PM
Event ID:      6005
Task Category: Management Agent Run Profile
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      (ComputerName).local
Description:
The management agent "(TenantName).onmicrosoft.com - AAD" failed on run profile "Delta Import" because of an unspecified management agent error.
Additional Information

 %3
Event Xml:
<Event xmlns=http://schemas.microsoft.com/win/2004/08/events/event>
  <System>
    <Provider Name="ADSync" />
    <EventID Qualifiers="49152">6005</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>1</Task>
    <Opcode>0</Opcode>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2023-12-13T20:32:21.0354588Z" />
    <EventRecordID>1412709</EventRecordID>
    <Correlation />
    <Execution ProcessID="0" ThreadID="0" />
    <Channel>Application</Channel>
    <Computer>(ComputerName).local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>(TenantName).onmicrosoft.com - AAD</Data>
    <Data>Delta Import</Data>
  </EventData>
</Event>

Error 2:

Log Name:      Application
Source:        ADSync
Date:          12/13/2023 3:32:21 PM
Event ID:      6401
Task Category: Server
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      (ComputerName).local
Description:
The management agent controller encountered an unexpected error.

 "ERR_: MMS(3932): ..\memutils.cpp(7665): Failed to start run because of undiagnosed MA error
Azure AD Sync 2.2.1.0"
Event Xml:
<Event xmlns=http://schemas.microsoft.com/win/2004/08/events/event>
  <System>
    <Provider Name="ADSync" />
    <EventID Qualifiers="49152">6401</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>3</Task>
    <Opcode>0</Opcode>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2023-12-13T20:32:21.0354588Z" />
    <EventRecordID>1412708</EventRecordID>
    <Correlation />
    <Execution ProcessID="0" ThreadID="0" />
    <Channel>Application</Channel>
    <Computer>(ComputerName).local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>ERR_: MMS(3932): ..\memutils.cpp(7665): Failed to start run because of undiagnosed MA error
Azure AD Sync 2.2.1.0</Data>
  </EventData>
</Event>

Appreciate your help with that.